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Maker, Thomas Mercer, England, c. 1970's. 7"h x 4.5"diameter - movement, 8" x  8". Model of John Arnold style spring detent escapement.  Bi-metallic balance temperature compensation. Two hour duration. Mercer had made few of these models, probably less than 10 in the 1970's. Some had damascened plates, some polished as in this example.

Arnold esc (4).JPG (788442 bytes)

Arnold esc (9).JPG (868670 bytes)

Arnold esc (15).JPG (820037 bytes)

Arnold esc (6).JPG (846489 bytes)

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